The weight of 12 sheets of a thick paper is 40 grams . How many sheets would weigh 1 kg?

The weight of 12 sheets of a paper is 50 grams. How many sheets will weigh 500 grams?

How many electrons would weigh 1 kg?

If the weight of 12 sheets of thick paper is 40 grams, how many sheets of the same paper would weigh 2(1)/2 kilograms?

If the weight of 12 sheets of thick paper is 40 grams, how many sheets of the same paper would weigh (2) 1/2 kilograms ?

If the weight of 12 sheets of thick paper is 40 grams, how many sheets of the same paper would weigh 16 2/3 kilograms?

If the weight of 12 sheets of thick paper is 40 grams,how many sheets of the same paper would weigh (2)(1)/(2) kilograms?

If the weight of 10 sheets of thick paper is 40 grams,How many sheets of the same paper would weight 800 grams?